Hitachi Astemo Ltd.

Makoto Matsuura

Daisuke Goto

Takahiro Ito

Ryusuke Hirao

Kenichiro Matsubara

Kyoshiro Itakura

Toshiyuki Ajima

Yoshifumi Kawasaki

There are provided a brake control device and a brake control method capable of estimating a rigidity change due to a temperature change, uneven wear of a brake pad, an inclination of a brake disc, or the like with a low memory load and with high accuracy up to a region with larger thrust than a measurement range. A brake control device controls a braking unit including a friction member pushed on a braking target member, a piston that abuts on the friction member and moves in a linear motion direction by rotation of an electric motor, and a thrust detection unit that detects thrust of the friction member to the braking target member. The brake control device estimates a relation between a piston position being rigidity of the braking unit, and the thrust, based on a first piston range that is a thrust change as a first inclination with respect to the piston position, and a second piston range that is a thrust change as a second inclination different from the first inclination, with respect to the piston position.

Brake control device and brake control method

A controller controls a suspension apparatus including a variable damper that adjusts a force between a vehicle body and a wheel of a vehicle. The controller includes a first instruction calculation portion and a control instruction output portion. The first instruction calculation portion outputs a first instruction value of a damping force, which corresponds to a first target amount, using a learning result acquired from machine learning in advance by inputting a plurality of different pieces of information. The control instruction output portion limits the first instruction value and outputs it as a control instruction in a case where the first instruction value works in a direction leading to a greater vehicle state amount than a predetermined amount due to control of the variable damper based on the first instruction value.

Suspension control apparatus and method for controlling a suspension control apparatus

A controller as a control apparatus controls a shock absorber of a control target wheel (a rear wheel) located in back of a detection target portion (a front wheel) of an unsprung acceleration sensor based on a detection value detected by the unsprung acceleration sensor on the front wheel side provided on a vehicle. In this case, the controller identifies a movement distance (a delay distance) from the detection target portion (the front wheel) and controls the shock absorber of the control target wheel (the rear wheel) located in back thereof based on the detection value of the unsprung acceleration sensor and a vehicle speed for each control period.

Control apparatus

An object of the present invention is to provide a brake control device and a brake system capable of braking with a shortened braking response when shifting from non-braking to braking. A brake control deviceincludes a command value calculation unitthat calculates an operation command value required to make a pressing force by which a brake padis pressed against a brake discreach a target thrust value. The command value calculation unitincludes: a clearance command calculation unitthat calculates a command value required for contact between the brake padand the brake disc; and a thrust command calculation unitthat calculates a command value required for reaching the target thrust from a state where the brake padand the brake discare in contact with each other. When calculating the operation command value from a state where the brake padand the brake discare separated, the command value calculation unitcalculates the operation command value by integrating the command value calculated from the clearance command calculation unitand the command value calculated from the thrust command calculation unit

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Hitachinaka, Japan

Makoto Matsuura